Spool or bobbin



H. J. DAVIS SPOOL 0R BOBBIN Filed March 23. 1927 UNITED STATES PATENT'oFFIcI-L.

HOHER J'. DAVIS, OF WILMINGTON, DELAWARE.

SPOOL OR BOBBIN.

Application filed March 23, 1927. Serial No. 177,721.

This invention relates to improvements in the construction of spools orbobbins generally adapted for use in receiving and winding insulatedelectric wire, enameled wire, -or similar material; silk, cotton andother threads or like materials and in larger sizes of such bobbins orspools, for winding cotton, silk and other iece goods or other textilematerials, the invention having for an object to provide, as an articleof manufacture, a spool or bobbin having the barrel and head portionsthereof firmly and rigidly clamped or secured in assembled relation by atubular or sleeve like metal element over which the barrel andrelatively spaced heads are snugly engaged, whereupon the opposite andextended ends of the metal element are swaged or laringly bent outwardlyinto clinching engagement with the adjacent portions of said heads,hence, firmly and bindly uniting the assembled parts and affordingthereby at a minimum production cost, a construction possessingmaterially greater strength, resist-ance and permancncy and longerWearing or usage qualities than those forms of types of similar devicesnow prevalent in the art.

It may also be stated to bean object of the invention to provide theimproved construction With a novel form of clamping or assemblingelement, the same being of an outside diameter approximatelycorresponding to the inside diameter of the barrel and heads, whereby tosnugly receive the same thereover, whereupon the extended opposite endsof the said element are bent or swaged outwardly into clinchingengagement with adjacent portions of the heads, forming in the outerperiphery of the element, with such outward bending or swaging,circumferentially extending Ways or grooves in which portions of theheads are engaged and thus, firmly secured with the added aforesaidclinching engagement.

Other objects of the invention will be in artobvious and in part pointedout hereinafter. l

In order that the invention and its mode of operation may be readilyunderstoodby those skilled in the art to which it appert-ains, I have inthe accompanying illustrative-drawings and in the detailed descriptionbased thereupon, set out one possible embodiment 0f my investies per,etc., as raw material.

In these drawings:

Figure 1 is a perspective of the improve spool or bobbin,

Figure 2 is a longitudinal section therethrough,

Figure 3 is a fragmentary longitudinal section through a slightlymodified form of the spool or bobbin,

Figure 4 is an enlarged fragmentary de tail in longitudinal sectionshowing the manner in which the clamping or assembling element isreceived by and engaged with the spool barrel and heads,

Figure 5 is a disassembled detail in section illustrating .the mode ofrelative arrangement and size of the bobbin or spool barrel, heads andclamping or assembling element,

Figure 6 is a longitudinal section through another modified form of thespool or bobbin, and

Figure 7 is a transverse section of the same. l

Having more particular reference to 'the drawings, in connection withwhich like characters of reference will designate corresponding partsthroughout, the improved bobbin or spool may be stated to comprise abarrel 1 and head pieces 2, these particular parts of the constructionbeing preferably ormed of vulcanized fibre, which as `will beunderstood, is produced by a chemical reaction on pure rag cellulosepaper, in contradistinction to'that form of product known in theparlance of the trade as fibre or pasteboard, this matter being amechanical product of the paper mills or board mills and being made upprincipally of pulp, old pa- However, While I have qualified to someextent the materials from which the barrel and heads of my iinrovedbobbin or spool are to be constructed, 1t will be fully understood thatvarious other forms of materials may, at times, be substituted therefor,such as preference or peculiar conditions may dictate.

As will be noted, the respective inside diameters of the barrel 1 andthe heads 2 correspond and likewise, the heads 2 are of complementalsize and formation.

A tubular assembling or clamping element 3 is provided the construction,this element being preferably formed of brass or of a metal possessingsimilar properties and convenient features of worklng; the outside di.-

ameter of the element 3 being the same or approximately the same as theinside dialneters of the barrel 1 and the heads 2, whereby the lattermay be snugly engaged over the outer peripheral surface otl the element25 as is indicated in the Figures 2 and Also, the length ot the tubularassembling or clamping elements 3 is greater than the width of thebobbin composed, in part of the assembled barrel and heads 2, thuscausing the opposite ends of such element to be extended for distancesbeyond the outer and adjacent sides of the relatively spaced heads 2.

. Following the arrangement or assembling of the parts of the bobbin orspool construetion and identified herein by the numerals 1, 2 and 3, thebarrel being intermediately arranged as respects the heads 2 and beingsnugly engaged over the element 3 as are thc. opposed and spaced heads2, the extended ends of the clamping element 3 are swaged or fiaringlybent outwardly, by suitable means, to that form as is indicated by thenumeral 4, whereu on the extremities of the element will have Ibindingor clinching like engagement with adjacent portions of the outer sidesof the heads 2 and consequently thereupon, will effecta positive or firmunitin of the barrel 1 and heads 2 by the rcsu tant binding like action.Because of this, it will be understood and appreciated that the elementsof construction of the bobbin or spool, will be positively and rigidlyinterconnected with respect to each other and thus rendered relativelyimmovable, hence producing a bobbin or spool construction possessingmaterially greater strength, resistance and permanency as well as longerwearing or usage qualities than is had b v those types of designs ofbobbins or spools now prevalent in the art.

Due to the flaringly outwardly bending or swage of the opposite ends ofthe assembling or clamping element 3, as is indicated by the numeral 4,it will be noted that circumferentially disposed or extending ways orgrooves will be formed in the outer peripheral surface-of the element 3adjacent such extended ends and the points of engagement of the elementwith the heads 2. Because of this, seats will be afforded for receivingthe now compressed rounded outer corner edges of the holes in therelatively spaced heads 2, thus giving greater rigidity to theirpositioning with respect to the adjacent or abutting ends of the barrel1 and also, materially and advantageously bracing said heads againstundesired relative movement or outward lateral displacement from theelement 3; such circumferentially disposed ways or grooves beingdesignated for convenience by the numeral 5 and exaggerated in theirshowing through the medium of the Figure 4.

In the Figure 8 I have shown a slightly modified form of bobbin orspool, wherein the barrel 1 and heads 2 are provided, these parts orelements of construction heilig assembled in much the saine fashion asisdescribed in connection with the embodiment illustrated in the Figures 1and 2; that is, being positioned in juxtaposed relation and having atubular assembling or clamping element 3 snugly engaged therethrough,the opposite ends of said element being extended for distances beyondthe outer sides of the relatively spaced heads 2 whereupon theseextended ends are fiaringly bent or swaged to positions as is shown orindicated by the numeral 4', the extremities of the lient or swagedportions clinchingly engaged portions of the heads 2 and thus bindinglyinterconnecting the barrel 1 and the heads 2, and giving to thisresultant construction, marked qualities of rigidity, strength.resistance and wear or usage. Also, it is to be noted at this point,that by the peculiar methods practiced in swaging or flaringly bendingthe opposite ends of the tubular element 6', circumferentially disposedways or grooves 5 will be formed therein adjacent these portions 4 andover or about their outer peripheral surfaces; the ways or groovesservingr to receive therein adjacent portions of the heads 2coinpressing the outer corner edges of the holes` in the outer heads toconform to the somewhat rounded shape of the element 3 and thus, addingfurther 4to the rigidity of the. assembled construction and materiallylessening the liability of lateral outward disengagement of the heads 2from the opposite ends of the clamping element il.

In this particular form of bobbin or spool as shown in the Figure 3, itwill he. noted that the outer portions of the inner sides of the heads 2are circumferentially chainfered. thus providing upon said inner sidesot the heads 2 annular inwardly disposed shoulders G, which shoulders inturn are adapted to snugly receive thereupon a secondary or false barrel7, the latter being of a materially greater size or diameter than is thebarrel 1 and providing thereby, a bobbin or spool affording a reduced orsmaller winding space; such constructions being especially advantageousfor use in the winding of threads or similar lengths of material as iscommonly used in textile mills.

In the Figures 6 and 7, I have disclosed still another modified form ofthe hohhin or spool. In this particular form of the invention` it willbe noted that I provide a device wherein the winding surfaces are inmultiple. that is, two or more separate and distinct winding surfacesare afforded thereby. the construction being preferably arrived at bythe snug arranging of barrels 8 and 9 upon n. somewhat elongated metaltubular assembling and clamping element 10, while heads 11 are alsosnugl engaged over the said element 10, certain ofy the heads beingpositioned adjacent the opposite extremities of the element lO Whereasthe intermediate head is arranged between the adjacent or inner ends ofthe barrels 8 and 9. In this Way, it will be understood that with theHaring bending or swaging of the extended extremities of the tubularelement 10, the outer extremities thereof will be bindingly andclinchingly engaged with the adjacent sides of the outermost heads 11,thus firmly interconnecting the elements 8, 9 and 1l represented by theconstruction in such a manner as to render the same relatively immovableand relatively rigid; the intermediate head 1() being bindingly andclampingly arranged or secured in its respective osition between theinner ends of the barre s 8 and 9 and thus secured against relativemovement or displacement.

At the respective ints of laringly bending or swaging of t e oppositeends of the element 10, it will be noted that peripherally disposedgrooves are formed in the outer surface thereof and into these groovesor Ways, adjacent portion of the outermost heads 10 are received,compressing and somewhat rounding the outer edges of the holes in saidheads to conform to the general shape or contour of said flaringly bentor swaged ends, thus, as described in the preceeding embodiments of theinvention, lending to the rigidity and strength of the resultingconstruction and additionally, lessening the liability of undue pullingor lateral outward displacement of said heads from said element 10.

It is timely to note that the assembling or clamping element indentifiedby the numeral 10 in this latter embodiment of the invention is squareor substantially square in cross section, rather than circular, as wasthe case with the corresponding elements in the preceeding embodimentsherein. This particular shape of assembling or clamping element isdesirable under certain conditions or where certain or pecularrequirements for a winding surface are had and as will be noted uponreference to the Figure 7 the cross sectional shape of the barrels 8 and9 and the openings formed in the heads 11 correspond thereto and are ofasize such as will insure their respective snug engagement over theouter surface of the element 10.

Also, if desirable, that form of the invention as illustrated in theFigure 3 may be constructed to provide a multiplicity of winding spacesi. e. one or more heads 2 intermediately of the relative opposed headssecured to or mounted upon the opposite extremities of the assembling orclamping element 3.

That the construction of the elements of my improved bobbin or spool maybe clearly understood from perusal of this specification, .it is deemedin order to state at this time that the vulcanized fibre heads employedin connection with the different embodiments of the device illustratedherein of the inner marginal portions thereof, that is, those portionsof the heads adjacent the holes or concentric openings formedtherethrough, shaped perfectly square as is illustrated in the Figure 5;similarly, that the marginal extremities of the barrel or liarrelsemployed in the bobbins or spools are also squarely or angularly shapedas is illustrated in the said Figure 5. ,lVheiu however, the elements ofthe bobbins or spools are assembled and are subjected to that pressureneeded to aringly bend, swage or rivet the outer extremities of thetubular elements 3, 3 or l0, it will be understood that the innermarginal portions of said heads, that is, the portions bordering theholes therethrough and the marginal extremities of the barrel or barrelsemployed will be slightly rounded or curved as is illustrated in theFigure 4, this being due to the somewhat yieldable character of thematerial from which said heads and barrels are constructed. Should,however, harder materials be employed for the construction of the headsand barrels of the bobbins or spools, it may be that in these instancesthe stressed marginal portions of the heads and of the barrel or barrelswill not be distorted or changed from their original shapes, which areto be understood as being perfectly square or angular, ashereinbeforedescribed and as is shown in the aforesaid Figure 5.

In the somewhat distorted formation of the stress portions of the headand the barrel illustrated in the Figure 4, it will be understood that apositive and binding contact will be established between these elementsand between the clinchingly and bindingly engaged anchoring elementemployed in conjunction therewith and consequently upon this,I that therigidity and stability of the resultant product will be materiallyenhanced, rather than detracted from by said distortion.

Manifestly, the construction shown is capable of considerablemodification and such modification as is within the scope of my claims,I consider Within the spirit of my invention.

I claim:

l. As an article of manufacture, a spool consisting of coaxiallydisposed barrel like bodies of diii'erent cross sectional sizes, thesmaller of said barrels being arranged within the other and inrelatively spaced relation to the same, heads adjacent the oppositeextremities of said barrels having portions of their inner sides formedwith shouldered parts adapted to snugly and bindingly reccive theadjacent opposite ends of the larger barrel thereover', such barrels andheads being cach formed of a hardened composite material, and a tubularmetal element bindngly received in and extended through the innermostand smaller of said barrels, said elements being of a length greaterthan the length of either of the barrels and having its extremitiesextended for distances beyond the adjacent ends of that barrel receivingthe same and having said heads engaged over the same and the extremitiesof the barrel being outwardly swaged upon themselves whereby tobindingly and clampingly engage adjacent portions of the barrel tobindingly and clampingly secure the same with respect to each of saldbarrels.

2. As an article of manufacture a spool consistin of a barrel like bodportion and heads adjacent the opposite en s thereof and in abuttingengagement therewith, said barrel and heads being formed of hardenedmaterial, and a metal tube bindingly received in and extended throughthe barrel and heads, the opposite ends of said metal tube being swaged,forming circumferentially disposed seats receiving the inner marginalportions of said heads and bearing directly against the same, andclampingly interconnecting the latter with the opposite and adjacentends of the barrel like body portion, the swaged ends of the metal tubeterminatinr in a plan substantially coincidental witi that of the outerperipheral surface of the barrel like body portion imparting directinward pressure upon those ortions of the heads contacting with thebarrel like body portion ends whereby to inwardly offset the same andeffect an intertting and interlocking engagement with said body portionends.

In witness whereof I have hereunto set my hand.

HOMER J. DAVIS.

